Dr. Tolu Oni leads the Global Diet and Physical Activity group and network at the University of Cambridge. She completed medical training in the UK and Australia, a Masters in Public Health in South Africa and a research doctorate at Imperial College London. She spent 11 years conducting research in South Africa. She established and leads a Research Initiative for Cities Health and Equity (RICHE), generating evidence to support development and implementation of healthy public policies in rapidly growing cities, with a focus on Africa. Research activities include Systems for Health projects: investigating how urban systems (e.g. housing, food) can be harnessed for health; and Health Systems projects: integrated health systems responses to changing patterns of disease and multimorbidity in the context of urbanisation. She continues this planetary health work at Cambridge focusing on meso- and macro-level determinants of diet and physical activity in the contexts of urbanisation and climate change worldwide.